81235520

素因数分解:

$2^6\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{137}}^1$

素因数の和:280

約数の個数: 112

約数和(自身を含む): 208208880

約数和(自身を除く): 126973360

約数列:

[1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 109, 136, 137, 160, 170, 218, 272, 274, 320, 340, 436, 544, 545, 548, 680, 685, 872, 1088, 1090, 1096, 1360, 1370, 1744, 1853, 2180, 2192, 2329, 2720, 2740, 3488, 3706, 4360, 4384, 4658, 5440, 5480, 6976, 7412, 8720, 8768, 9265, 9316, 10960, 11645, 14824, 14933, 17440, 18530, 18632, 21920, 23290, 29648, 29866, 34880, 37060, 37264, 43840, 46580, 59296, 59732, 74120, 74528, 74665, 93160, 118592, 119464, 148240, 149056, 149330, 186320, 238928, 253861, 296480, 298660, 372640, 477856, 507722, 592960, 597320, 745280, 955712, 1015444, 1194640, 1269305, 2030888, 2389280, 2538610, 4061776, 4778560, 5077220, 8123552, 10154440, 16247104, 20308880, 40617760, 81235520]

約数ペア:

[(1, 81235520), (2, 40617760), (4, 20308880), (5, 16247104), (8, 10154440), (10, 8123552), (16, 5077220), (17, 4778560), (20, 4061776), (32, 2538610), (34, 2389280), (40, 2030888), (64, 1269305), (68, 1194640), (80, 1015444), (85, 955712), (109, 745280), (136, 597320), (137, 592960), (160, 507722), (170, 477856), (218, 372640), (272, 298660), (274, 296480), (320, 253861), (340, 238928), (436, 186320), (544, 149330), (545, 149056), (548, 148240), (680, 119464), (685, 118592), (872, 93160), (1088, 74665), (1090, 74528), (1096, 74120), (1360, 59732), (1370, 59296), (1744, 46580), (1853, 43840), (2180, 37264), (2192, 37060), (2329, 34880), (2720, 29866), (2740, 29648), (3488, 23290), (3706, 21920), (4360, 18632), (4384, 18530), (4658, 17440), (5440, 14933), (5480, 14824), (6976, 11645), (7412, 10960), (8720, 9316), (8768, 9265)]